結果

問題 No.2569 はじめてのおつかいHard
ユーザー binapbinap
提出日時 2023-12-02 16:35:07
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 324 ms / 2,000 ms
コード長 3,473 bytes
コンパイル時間 4,499 ms
コンパイル使用メモリ 285,608 KB
実行使用メモリ 32,136 KB
最終ジャッジ日時 2023-12-02 16:35:30
合計ジャッジ時間 8,236 ms
ジャッジサーバーID
(参考情報)
judge15 / judge11
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 191 ms
14,392 KB
testcase_01 AC 195 ms
14,392 KB
testcase_02 AC 189 ms
14,392 KB
testcase_03 AC 197 ms
14,392 KB
testcase_04 AC 189 ms
14,392 KB
testcase_05 AC 306 ms
31,108 KB
testcase_06 AC 324 ms
18,172 KB
testcase_07 AC 269 ms
31,900 KB
testcase_08 AC 298 ms
32,136 KB
testcase_09 AC 268 ms
16,240 KB
testcase_10 AC 2 ms
6,676 KB
testcase_11 AC 2 ms
6,676 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#include<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef vector<int> vi;
typedef vector<long long> vl;
typedef vector<vector<int>> vvi;
typedef vector<vector<long long>> vvl;
typedef long double ld;
typedef pair<int, int> P;

ostream& operator<<(ostream& os, const modint& a) {os << a.val(); return os;}
template <int m> ostream& operator<<(ostream& os, const static_modint<m>& a) {os << a.val(); return os;}
template<typename T> istream& operator>>(istream& is, vector<T>& v){int n = v.size(); assert(n > 0); rep(i, n) is >> v[i]; return is;}
template<typename U, typename T> ostream& operator<<(ostream& os, const pair<U, T>& p){os << p.first << ' ' << p.second; return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : " "); return os;}
template <typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : ""); return os;}

template<typename T>
struct Edge_Dijkstra{
	int from, to;
	T cost;
	Edge_Dijkstra(int from, int to, T cost) : from(from), to(to), cost(cost) {};
};

const long long INF = 1001001001001001;
template<typename T>
struct Dijkstra{
	int n, m;
	vector<bool> initialized;
	vector<Edge_Dijkstra<T>> E;
	vector<vector<int>> G;
	map<int, vector<T>> dist;
	map<int, vector<int>> idx;
	Dijkstra(int _n) : n(_n), m(0), initialized(n, false), G(n){}
	void add_edge(int from, int to, T cost){
		Edge_Dijkstra e(from, to, cost);
		E.push_back(e);
		G[from].emplace_back(m);
		m++;
	}
  void calc(int s){
    initialized[s] = true;
    dist[s] = vector<T>(n, INF);
    idx[s] = vector<int>(n, -1);
    priority_queue<tuple<T, int, int>, vector<tuple<T, int, int>>, greater<tuple<T, int, int>>> pq;
    pq.emplace(0, s, -1);
    while(pq.size()){
      auto [cost, from, index] = pq.top(); pq.pop();
      if(dist[s][from] <= cost) continue;
      dist[s][from] = cost;
      idx[s][from] = index;
      for(int index : G[from]){
        int to = E[index].to;
        T cost_plus = E[index].cost;
        if(dist[s][to] <= cost + cost_plus) continue;
        pq.emplace(cost + cost_plus, to, index);
      }
    }
  }
  int farthest(int s){
  	if(!initialized[s]) calc(s);
  	int idx = 0;
  	rep(i, n) if(dist[s][i] > dist[s][idx]) idx = i;
  	return idx;
  }
  T get_dist(int s, int t){
    if(!initialized[s]) calc(s);
    return dist[s][t];
  }
  vi restore(int s, int t){
    if(!initialized[s]) calc(s);
    if(dist[s][t] == INF) return vi(0);
    vi res;
    while(idx[s][t] != -1){
      auto e = E[idx[s][t]];
      res.push_back(idx[s][t]);
      t = e.from;
    }
    reverse(res.begin(), res.end());
    return res;
  }
};

void chmin(long long& a, long long b){
	a = min(a, b);
}

int main(){
	int n, m;
	cin >> n >> m;
	Dijkstra<long long> graph1(n), graph2(n);
	rep(i, m){
		int u, v;
		long long t;
		cin >> u >> v >> t;
		u--; v--;
		graph1.add_edge(u, v, t);
		graph2.add_edge(v, u, t);
	}
	long long alpha = graph1.get_dist(n - 2, n - 1);
	long long beta = graph1.get_dist(n - 1, n - 2);
	rep(from, n - 2){
		long long ans = INF;
		chmin(ans, graph2.get_dist(n - 2, from) + alpha + graph1.get_dist(n - 1, from));
		chmin(ans, graph2.get_dist(n - 1, from) + beta + graph1.get_dist(n - 2, from));
		if(ans >= INF) cout << -1 << "\n";
		else cout << ans <<"\n";
	}
	return 0;
}
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